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I'm looking to splice wires from a DB-sub (9 pin) connector out to a breadboard but I'm getting different pictures for color-coding which makes me confused. What's more confusing is the connect I have only has 4 wires form the cable despite having 9 pins. The colors (red, black, brown, and orange) include some colors not listed in the color code I found below. I must be looking at the wrong color code but I don't know where to find the right one? Thanks


DB9 Color Code.

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    \$\begingroup\$ why do you feel that all 9 pins should be used? \$\endgroup\$ – jsotola Jun 9 '19 at 23:27
  • \$\begingroup\$ Many DB9 have only 3 pins wired: TXD, RXD and Ground. No idea why four, though. \$\endgroup\$ – DoxyLover Jun 10 '19 at 7:10
  • \$\begingroup\$ Thx for the insight. I guess I’ll have to play around with what wires and connections end up working \$\endgroup\$ – Seth Shill Jun 11 '19 at 5:39
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There is no standard for color codes. The chart you found seems to be using the resistor color codes, but shifted by 1 for some reason.

You're just going to have to "buzz out" the connections one-by-one using an ohmmeter or something.

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